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9 papers · 2 filters
The accretion of dark matter subhaloes within the cosmic web: primordial anisotropic distribution and its universality
Xi Kang, Peng Wang
The distribution of galaxies displays anisotropy on different scales and it is often referred as galaxy alignment. To understand the origin of galaxy alignments on small scales, on…
Vortical Motions of Baryonic Gas in the Cosmic Web: Growth History and Scaling Relation
Weishan Zhu, Long-long Feng
The vortical motions of the baryonic gas residing in large scale structures are investigated by cosmological hydrodynamic simulations. Proceeding in the formation of the cosmic web…
The Age-Redshift Relationship of Old Passive Galaxies
Jun-Jie Wei, Xue-Feng Wu, Fulvio Melia +2
We use 32 age measurements of passively evolving galaxies as a function of redshift to test and compare the standard model (CDM) with the Universe. We show that t…
Cosmic reionization of hydrogen and helium: contribution from both mini-quasars and stars
Jing-Meng Hao, Ye-Fei Yuan, Lei Wang
Observations on the high-redshift galaxies at imply that their ionizing emissivity is unable to fully reionize the Universe at . Either a high escape fraction of ion…
Utilizing the Updated Gamma-Ray Bursts and Type Ia Supernovae to Constrain the Cardassian Expansion Model and Dark Energy
Jun-Jie Wei, Qing-Bo Ma, Xue-Feng Wu
We update gamma-ray burst (GRB) luminosity relations among certain spectral and light-curve features with 139 GRBs. The distance modulus of 82 GRBs at can be calibrated wit…
Chandra and XMM-Newton observations of the merging cluster of galaxies PLCK G036.7+14.9
B. Zhang, L. P. David, C. Jones +13
We present Chandra and XMM-Newton observations of PLCK G036.7+14.9 from the Chandra-Planck Legacy Program. The high resolution X-ray observations reveal two close subclusters, G036…